Disturbances like fires and insect infestations literally leave a mark on trees, creating scars in annual tree rings. Since our research team is interested in the fire history of the landscape, we need to be able to tell fire scars reliably apart from scars left by insects. With two full field seasons now in the books, Dr. Cameron Naficy’s Fire Regime Team have become local experts in this challenging task. In this post, we describe the challenges of distinguishing scar types, provide some insights on how our team solves these puzzles, and explore the important connections between insects and fire.